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    • 26. 发明授权
    • Monitoring lens apparatus and monitoring camera
    • 监控镜头设备和监控摄像机
    • US07460319B2
    • 2008-12-02
    • US11798887
    • 2007-05-17
    • Daigo AibaShigeru Yoshida
    • Daigo AibaShigeru Yoshida
    • G02B7/02
    • G02B7/10G08B13/19619G08B13/1963H04N5/2251H04N5/23238
    • A monitoring lens apparatus is provided and includes a fixed cylinder, a first lens frame provided at an inner portion of the fixed cylinder and movable in an optical axis direction, a second lens frame provided at the inner portion of the fixed cylinder and movable in the optical axis direction, a first ring provided rotatably to the fixed cylinder and provided with a cam groove for driving the first lens frame, a second ring provided rotatably to the fixed cylinder on an object side of the first ring and provided with a cam groove for driving the second lens frame, and an extended portion provided integrally with the first ring and extended to the object side to cover an outer periphery of the second ring.
    • 提供一种监视透镜装置,包括:固定筒,设置在固定筒的内部并沿光轴方向移动的第一透镜框,设置在固定筒的内部并可在该固定筒的内部移动的第二透镜框 光轴方向,第一环可旋转地设置在固定筒上,并设置有用于驱动第一透镜框的凸轮槽,第二环可旋转地设置在第一环的物体侧的固定筒上,并设置有用于 驱动第二透镜框,以及延伸部,与第一环一体地设置并延伸到物体侧以覆盖第二环的外周。
    • 28. 发明授权
    • Method and apparatus for correcting tilt of light beam to optical recording medium
    • 用于校正光束到光学记录介质的倾斜的方法和装置
    • US07187636B2
    • 2007-03-06
    • US10651454
    • 2003-08-29
    • Masahiro KatoTatsuhiro YoneShigeru YoshidaKanji Ishihara
    • Masahiro KatoTatsuhiro YoneShigeru YoshidaKanji Ishihara
    • G11B20/20
    • G11B7/0956G11B7/0053
    • A tilt of a light beam to be radiated onto an information recording disk is corrected without using a dedicated tilt sensor. The correction is performed based on the characteristic that an offset amount between a tilt amount maximizing an RF signal amplitude and a further tilt amount maximizing an LPP signal amplitude is constant and independent of positions on the same disk. A pre-pit signal indicative of an existence/nonexistence of a pre-pit formed on the disk is produced from returned light of the light beam, while an RF signal is produced from bits of information recorded on the disk on the basis of the returned light. An optimum tilt-correcting amount is decided by making use of a relationship between the pre-pit signal and the RF signal at a particular tilt amount. The tilt amount is corrected using the optimum tilt-correcting amount.
    • 在不使用专用倾斜传感器的情况下校正要辐射到信息记录盘上的光束的倾斜。 基于将RF信号幅度最大化的倾斜量与使LPP信号振幅最大化的另一倾斜量之间的偏移量恒定并且与同一盘上的位置无关的特性进行校正。 由光束的返回光产生表示形成在盘上的预制凹坑的存在/不存在的预凹坑信号,同时根据返回的光盘从记录在盘上的信息的位产生RF信号 光。 通过利用预定凹坑信号和RF信号之间的关系以特定倾斜量来确定最佳倾斜校正量。 使用最佳倾斜校正量校正倾斜量。